Paste dispensing device



De. 12, 1933. H. H. HOMPSON 1,939,582

PASTE DISPENSING DEVICE Filed Oct. 26, 1932 6 INVENTOR WITNESS H H T]? 6WA BY 113k ATTORN EY Patented l )ec.'1 2, 19 33 u IrEosrA PATENT OFFICE-PAsTn msPENsmG DEVICE Harry Thompson, Medina, Ohio Application amnes a,i932: SerialNo. 639,681 I 2Claims. (013221578) My invention relates toimprovements'in devices for dispensing material in paste or plasticform, such as tooth paste and the like, and it consists in thecombinations, constructions and arrangements herein described andclaimed.

A number of devices for dispensing paste have been used, but thesedevices have certain objec-' tionable features. Those of the plungertype usually require a tight or sliding fit between the plunger and thecylinder wall. Others require specially constructed valves. In some theupward movement of the plunger is liable'to take with it some of thepaste and certain of the devices are costly to make.

An object of my invention is to provide a device for dispensing pastewhich can be made at a low cost and in whichthe use of ports or valvesis obviated.

A further object is to provide a device of the type in which a plungeris caused to reciprocate to effect the ejection of a portion of thepaste, the ejecting stroke being controlled 'by a spring so that thestroke is uniform. I 25' A further object is to provide a dispensing.device having a plunger which is so made as to cause the paste to bepushed aside during the upward stroke, but to be caught under the faceof the plunger and ejected on the downward stroke.

A further object is to provide a device in which in the dischargeopening, thereby preventing the opening from clogging due to the dryingof the paste and insuring the instant discharge of the 5 paste when thedevice is in use.

Other objects and .advantages will appear inv the followingspecification and the novel features of the invention will beparticularly pointed out 4 in the appended claims. 4b

device, and

Figure 2 is a vertical central sectional view.

In carrying out my invention I make use preferably of a glass containerof the shape shown in the drawing. This has a cylindrical body por-'tion 1 which is threaded at 2 to receive a threaded cap 3. The body isprovided with integral spaced-apart flanges 4 and 5 respectively. Thespace between these flanges forms a groove for receiving a. supportingband 6 which maybe held in position by means of screws 7. Below thelower band 5 the bottom of the container is curved in the manner shown.At the central portion of the bottom there is an opening 8 through whichthe paste is discharged.

The cap 3 is provided with an opening 9 and disposed in this opening isthe stem 10 of the plunger 11.. The stem has-a flange portion 12.Arranged to bear on the flange portion 12 at one end and on theunderside of the cap 3 at the other end is a spiral spring 13.

From the foregoing description of the various parts of the devicetheoperation thereof may be readily understood. In order to fill thecontainer the screw cap is removed and paste, such as that shown at 14,is placed in the container. The plunger 11 is enlarged towards its lowerend, this enlargement being in the form of a gradual 7 outward curve atthe side surfaces of the plunger. The latter has a flat face 15 whichspans the rounded bottom so as to normally rest on the sides of thecontainer. The-plunger has a reduced extension 16 which extends into theopening 8 and normally closes this opening.

In using the device the plunger stem is grasped and is raised and thenreleased; The raising of the stem will cause the upward travel of theplunger and the paste will be forced aside and down underneath theplunger. Now when the plunger stem 10 is released, the plunger, throughthe action ofthe spring 13, will be moved downwardly and the paste willbe forced out through full effect then the face of the plunger will reston the sides of the container while the extension 16 will flll theopening.

It will be seen that owing to this construction there is never anydanger of the opening becoming clogged nor of any escape of the plasticmaterial through the opening while the device is the liability of theextension adhering to the walls of the openingthrough the drying out ofthe paste. 1 The plunger forms an auxiliary closure member by itscontact with the walls. It will further be noted that when the plungerstem 10 is lifted'no matter how quickly or slowly, the spring 13 will 0always act when the plunger stem is released with 1 the same force todrive the plunger downwardly and to force the paste out of the opening.This insures a uniform amount of the material with each reciprocation ofthe plunger.

The flange 12 has a double function since it 1 the opening 8. When thespring has exerted its 85 acts as a means for imparting movement fromthe spring to the plunger and it also serves to prevent the drawing ofany paste through the opening 9 when the plunger stem is raised. Thedevice as described can be manufactured cheaply and is not liable to getout of order, since there are no valves or tight fitting pistons.

I claim:

1. In a paste dispensing device, a container having a tapered bottom andbeing provided with an opening in said bottom, a cap or closure for saidcontainer having an opening, a plunger stem arranged to extend throughsaid closure opening,

a flange carried by the plunger stem, a spiral and constituting anauxiliary closure member, and

an extension carried by said plunger, and arranged to enter the openingin the bottom to prevent the clogging of the opening.

2. In a paste dispensing device, a glass container having a cylindricalbody portion, said body portion being threaded at its upper end andbeing provided with a band-receiving groove, the bottom portion of thecontainer being tapered and having a discharge opening at its lower end,a threaded cap arranged to be screwed to the body portion and havingacentral opening, a plunger stem arranged to extend through said centralopening, said plunger stem having a flange di posed'withinthe container,a spiral spring disposed between the flange and the cap, a plungerhaving curved outwardly flared sides, and being provided with a flat endportion arranged to engage the side walls of the container to form aclosure member, and a central extension secured to said plunger andarranged to engage in the opening in the bottom to prevent the cloggingthereofz.

HARRY H. THOMPSON.

